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Title: Estimation of flow parameters using laser anemometry
Author: Daudpota, Q. Isa
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1976
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The use of a photon count correlator for the analysis of different flow situations is described. The problem of flow parameter estimation from the correlogram is discussed in some detail. After describing some, approximate methods, the least square fitting and Fourier transformation methods are considered. The effect of frequency shifting on parameter estimation is described. The use of high resolution estimators such as the Maximum Entropy and Maximum Likelihood spectra have been considered. An experiment on a sinusoidally fluctuating flow is described. The error involved in uniform random clipping of photon counts in order to make the correlogram independent of the field statistics is derived. The errors in the determination of the mean and variance of the velocity using a burst counter are derived. This is accomplished by assuming Poisson sampling of a continuous velocity record with a known correlation function. The method of obtaining the turbulence spectra from the burst counter data is described.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available